EP 0658217 A1 19950621 - PROCESS FOR THE REMOVAL OF SALTS FROM ALUMINUM DROSS.
Title (en)
PROCESS FOR THE REMOVAL OF SALTS FROM ALUMINUM DROSS.
Title (de)
Verfahren zur Abtrennung von Salzen aus Aluminiumkrätze.
Title (fr)
PROCEDE D'EXTRACTION DE SELS DE SCORIE D'ALUMINIUM.
Publication
Application
Priority
- US 9208077 W 19920923
- US 76603591 A 19910926
Abstract (en)
[origin: WO9306254A1] A process is disclosed for treating salt-containing aluminum dross to remove potassium and sodium chloride salts therefrom. The process generally comprises treating the dross in a first treating step with a leaching solution having a pH maintained in the range of about 6-7 to remove a portion of the salt content thereof; filtering the residual solids from the first leaching solution; and treating the filtered solids in a second treating step with a second leaching solution having a pH maintained above about 8, and preferably above about 9. The pH of the first leaching solution is maintained in the desired range by the addition of hydrochloric acid, and the pH of the second leaching solution is maintained in the desired range by the addition of potassium and/or sodium hydroxide.
IPC 1-7
IPC 8 full level
C22B 3/04 (2006.01); C22B 21/00 (2006.01)
CPC (source: EP US)
C22B 21/0007 (2013.01 - EP US)
Citation (search report)
See references of WO 9306254A1
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
WO 9306254 A1 19930401; CA 2120024 A1 19930401; EP 0658217 A1 19950621; JP H07501851 A 19950223; US 5227143 A 19930713
DOCDB simple family (application)
US 9208077 W 19920923; CA 2120024 A 19920923; EP 92921111 A 19920923; JP 50634593 A 19920923; US 76603591 A 19910926